Why do I obsess over doing everything right?

It's like I obsess over everything that I do wrong. Like if something doesn't go the way I want it...I get mad at myself, at that person, or the whole situation in general. I feel helpless and just...like ugh!. I feel like I'm going insane sometimes because all of these negative thoughts keep popping up in my head and I can't get rid of them. I just don't understand why I can't just let go of these thoughts and live my life carelessly. Like I long to...have no worries and, to not have to stress over anything..I just wish that was possible but my mind won't let me do that...Help?